Flat heel



FIG. 1 is a rear left side perspective view showing the flat heel with our design;

FIG. 2 is a is a rear right side perspective view showing the flat heel with our design;

FIG. 3 is a rear elevation view of the flat heel with our design;

FIG. 4 is a right side elevation view of the flat heel with our design;

FIG. 5 is a left side elevation view of the flat heel with our design; and,

FIG. 6 is a greatly enlarged section of the flat heel with our design as shown in FIG. 3. 

CLAIM The ornamental design for a flat heel, substantially as shown and described. 